Sixteen planets were discovered by SWEEPS. They took from 0.6 to 4.2 days to go around the Sun. Planets which took less than 1.2 days to go around the sun have not been detected yet; these have been called "ultra-short period planets" (USPPs) by the search team. USPPs were discovered only around stars with a low mass. This means that larger stars might have destroyed any planets orbiting so closely, or that planets could not move as far inward around larger stars.[3]

SWEEPS-4 and SWEEPS-11 orbited stars that were very different to other stars close by. This made it possible for these to be looked at again using the radial velocity method. Their masses could then be found.[2]